| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #pragma once |
| |
| #include <type_traits> |
| #include "Configuration.h" |
| #include <stdint.h> |
| #include <media/nblog/NBLog.h> |
| |
| namespace android { |
| |
| struct FastThreadDumpState; |
| |
| // Represents a single state of a FastThread |
| struct FastThreadState { |
| using Command = uint32_t; |
| static const Command |
| INITIAL = 0, // used only for the initial state |
| HOT_IDLE = 1, // do nothing |
| COLD_IDLE = 2, // wait for the futex |
| IDLE = 3, // either HOT_IDLE or COLD_IDLE |
| EXIT = 4; // exit from thread |
| // additional values defined per subclass |
| Command mCommand = INITIAL; // current command |
| int32_t* mColdFutexAddr = nullptr; // for COLD_IDLE only, pointer to the associated futex |
| unsigned mColdGen = 0; // increment when COLD_IDLE is requested |
| // so it's only performed once |
| |
| // This might be a one-time configuration rather than per-state |
| FastThreadDumpState* mDumpState = nullptr; // if non-NULL, then update dump state periodically |
| NBLog::Writer* mNBLogWriter = nullptr; // non-blocking logger |
| |
| // returns NULL if command belongs to a subclass |
| static const char *commandToString(Command command); |
| }; // struct FastThreadState |
| |
| // No virtuals. |
| static_assert(!std::is_polymorphic_v<FastThreadState>); |
| |
| } // namespace android |